<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>div+css</title>
	<style>
		.border{width: 200px;height: 200px;border:5px solid #38f;border-radius: 5%;}
	</style>
</head>
<body>
	<div class="border"></div>
</body>
</html>